Look around at the flight field and you will likely discover that most who are having engine problems are running upside down engines. Yes the problems can be resolved. Yes some prefer appearance over simplicity which is perfectly OK.

I prefer reliability and simplicity and flight time over appearance and mount engines in the 9 o'clock to 12 o'clock position. Right side up engines are just easier to tune and keep running properly.

But the mounting options are your choice.

BillS